I am seating MP HG275 boolits in 9mm cases. The profile of the boolit requires me to seat them deep. When I pull the boolits I find that they now have a boat tail profile since the case is too narrow. You'll notice the previously sharp base of my boolit now looks cruddy in my pic.
I'm considering having a machinist turn down my expander plug so it expands .200" deeper now. I drew a diagram below.
Any thoughts on this?